[feat] add a cli client

.gitignore

@@ -2,7 +2,11 @@
 cmd/bitmask-vpn/bitmask-vpn
 /bitmask-helper
 cmd/bitmask-helper/bitmask-helper
+/bitmask-cli
+cmd/bitmask-cli/bitmask-cli
+
 locales/*/out.gotext.json
+tools/transifex/transifex
+
 .*.swp
 *.exe
-tools/transifex/transifex

cmd/bitmask-cli/main.go

+// Copyright (C) 2018 LEAP
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"os/signal"
+
+	"0xacab.org/leap/bitmask-systray/pkg/bitmask"
+	"golang.org/x/text/language"
+	"golang.org/x/text/message"
+)
+
+const (
+	provider = "riseup.net"
+	logFile  = "systray.log"
+)
+
+var version string
+
+func main() {
+	if len(os.Args) <= 1 {
+		help()
+		os.Exit(1)
+	}
+
+	switch os.Args[1] {
+	case "connect":
+		start()
+	case "version":
+		fmt.Println(version)
+	default:
+		help()
+	}
+}
+
+func help() {
+	fmt.Println(`Bitmask VPN - commands:
+	help    - Displays this help
+	connect - Connects to the VPN (stops by ctrl-c)
+	version - Displays the version`)
+}
+
+func start() {
+	signalCh := make(chan os.Signal, 1)
+	signal.Notify(signalCh, os.Interrupt)
+
+	b, err := bitmask.Init(message.NewPrinter(language.English))
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer b.Close()
+
+	err = b.StartVPN(provider)
+	if err != nil {
+		log.Println(err)
+		os.Exit(1)
+	}
+
+	<-signalCh
+}